bool ModelImporter::ImportModel()
{
LOGDEBUGF("Importing Model: %s", asset_->GetPath().CString());
SharedPtr<OpenAssetImporter> importer(new OpenAssetImporter(context_));
importer->SetVerboseLog(true);
importer->SetScale(scale_);
importer->SetExportAnimations(false);
importer->SetImportNode(importNode_);
if (importer->Load(asset_->GetPath()))
{
importer->ExportModel(asset_->GetCachePath());
return true;
}
else
{
asset_->PostImportError(importer->GetErrorMessage());
}
return false;
}
bool ShaderProgram::Link()
{
PROFILE(LinkShaderProgram);
Release();
if (!graphics || !graphics->IsInitialized())
{
LOGERROR("Can not link shader program without initialized Graphics subsystem");
return false;
}
if (!vs || !ps)
{
LOGERROR("Shader(s) are null, can not link shader program");
return false;
}
if (!vs->GLShader() || !ps->GLShader())
{
LOGERROR("Shaders have not been compiled, can not link shader program");
return false;
}
const String& vsSourceCode = vs->Parent() ? vs->Parent()->SourceCode() : String::EMPTY;
const String& psSourceCode = ps->Parent() ? ps->Parent()->SourceCode() : String::EMPTY;
program = glCreateProgram();
if (!program)
{
LOGERROR("Could not create shader program");
return false;
}
glAttachShader(program, vs->GLShader());
glAttachShader(program, ps->GLShader());
glLinkProgram(program);
int linked;
glGetProgramiv(program, GL_LINK_STATUS, &linked);
if (!linked)
{
int length, outLength;
String errorString;
glGetProgramiv(program, GL_INFO_LOG_LENGTH, &length);
errorString.Resize(length);
glGetProgramInfoLog(program, length, &outLength, &errorString[0]);
glDeleteProgram(program);
program = 0;
LOGERRORF("Could not link shaders %s: %s", FullName().CString(), errorString.CString());
return false;
}
LOGDEBUGF("Linked shaders %s", FullName().CString());
glUseProgram(program);
char nameBuffer[MAX_NAME_LENGTH];
int numAttributes, numUniforms, numUniformBlocks, nameLength, numElements;
GLenum type;
attributes.Clear();
glGetProgramiv(program, GL_ACTIVE_ATTRIBUTES, &numAttributes);
for (int i = 0; i < numAttributes; ++i)
{
glGetActiveAttrib(program, i, (GLsizei)MAX_NAME_LENGTH, &nameLength, &numElements, &type, nameBuffer);
VertexAttribute newAttribute;
newAttribute.name = String(nameBuffer, nameLength);
newAttribute.semantic = SEM_POSITION;
newAttribute.index = 0;
for (size_t j = 0; elementSemanticNames[j]; ++j)
{
if (newAttribute.name.StartsWith(elementSemanticNames[j], false))
{
int index = NumberPostfix(newAttribute.name);
if (index >= 0)
newAttribute.index = (unsigned char)index;
break;
}
newAttribute.semantic = (ElementSemantic)(newAttribute.semantic + 1);
}
if (newAttribute.semantic == MAX_ELEMENT_SEMANTICS)
{
LOGWARNINGF("Found vertex attribute %s with no known semantic in shader program %s", newAttribute.name.CString(), FullName().CString());
continue;
}
newAttribute.location = glGetAttribLocation(program, newAttribute.name.CString());
attributes.Push(newAttribute);
}
glGetProgramiv(program, GL_ACTIVE_UNIFORMS, &numUniforms);
int numTextures = 0;
for (int i = 0; i < numUniforms; ++i)
{
glGetActiveUniform(program, i, MAX_NAME_LENGTH, &nameLength, &numElements, &type, nameBuffer);
String name(nameBuffer, nameLength);
if (type >= GL_SAMPLER_1D && type <= GL_SAMPLER_2D_SHADOW)
{
// Assign sampler uniforms to a texture unit according to the number appended to the sampler name
int location = glGetUniformLocation(program, name.CString());
int unit = NumberPostfix(name);
// If no unit number specified, assign in appearance order starting from unit 0
if (unit < 0)
unit = numTextures;
// Array samplers may have multiple elements, assign each sequentially
if (numElements > 1)
{
Vector<int> units;
for (int j = 0; j < numElements; ++j)
units.Push(unit++);
glUniform1iv(location, numElements, &units[0]);
}
else
glUniform1iv(location, 1, &unit);
numTextures += numElements;
}
}
glGetProgramiv(program, GL_ACTIVE_UNIFORM_BLOCKS, &numUniformBlocks);
for (int i = 0; i < numUniformBlocks; ++i)
{
glGetActiveUniformBlockName(program, i, (GLsizei)MAX_NAME_LENGTH, &nameLength, nameBuffer);
// Determine whether uniform block belongs to vertex or pixel shader
String name(nameBuffer, nameLength);
bool foundVs = vsSourceCode.Contains(name);
bool foundPs = psSourceCode.Contains(name);
if (foundVs && foundPs)
{
LOGWARNINGF("Found uniform block %s in both vertex and pixel shader in shader program %s");
continue;
}
// Vertex shader constant buffer bindings occupy slots starting from zero to maximum supported, pixel shader bindings
// from that point onward
unsigned blockIndex = glGetUniformBlockIndex(program, name.CString());
int bindingIndex = NumberPostfix(name);
// If no number postfix in the name, use the block index
if (bindingIndex < 0)
bindingIndex = blockIndex;
if (foundPs)
bindingIndex += (unsigned)graphics->NumVSConstantBuffers();
glUniformBlockBinding(program, blockIndex, bindingIndex);
}
return true;
}
